Start work on cross-referencing channels
Check frequency data in db against scanned channels
Search for outdated entries in database
Update comments
Add videosource option and remove sourceid option
Update multiplex/serviceid for missing channels
Also check config channel callsign matches scanned channel callsign
Be less picky about frequency when finding a multiplex
Update multiplex where SID ok but tuning details different
Set channel visibile if everything is OK
Deal with case where we have don't have any matches on callsign more elegantly
Sub out : in callsign on database
Fix some channels that moved